>> axelrod: tonight, state of emergency. a monster wildfire ragin ragingn california could threaten san francisco's power and water supplies. teresa garcia is on the scene. 50 years after martin luther king shared his dream, thousands of people retrace his steps. jeff pegues is on the washington mall. >> i'm not prepared to sit down and give up. >> axelrod: president obama weighs military options against syria, even as the regime denies responsibility for chemical attacks. holly williams has the latest. and school's out, but this bus has been bringing meals to hungry children all summer. don dahler takes us on a lunch break. >> they help you be healthy. captioning sponsored by cbs this is the "cbs evening news."

>> axelrod: good evening. i'm jim axelrod. we begin tonight in california where firefighters are battling a massive wildfire in and around yosemite national park. it's threatening the power and water supply some 150 miles to the west in san francisco. governor jerry brown has declared a state of emergency as 2600 firefighters battled the nearly 200 square mile fire. right now, just 5% of the fire is under control. as teresa garcia reports, the flames are moving toward a reservoir that supplies most of san francisco's water and has already shut down two of the city's hydroelect power plants. >> reporter: the fastest growing wildfire in the nation is now raging i raging in partsf yosemite national park. at nearly 200 square miles, the massive fire is swallowing everything in its path, threatening more than 4500 homes, buildings, and campsites and burning more than 125,000

acres. >> it's scary. you just don't want to see your house go up. we have so many memories until last year. >> the fire is moving to the north. >> reporter: tonight, officials in san francisco are monitoring the situation closely. the fire is threatening some of san francisco's vital utilities. the city owns power lines just outside the fire zone, and 85% of its water comes from the resvorabout four miles from the inferno. the city is fearing ash contamination to the water supply, so on friday it announced it's prepared to tap backup reservoirs. michael carlin is with the public utilities commission. >> the biggest message is the water is safe. we have emergency procedures for it. we know what to do. and we feel very confident that we can provide the water to each and every one of our customers. >> reporter: the rim fire is burning in several different directions and proving hard to contain. fire officials say the thick smoke, dry brush, and steep, rugged terrain has made it difficult to carve out control lines. >> it's drier than lumber you

buy bay tay lumberyard. >> reporter: air tankers and helicopters are battling the fighter's forward progress. three miles from the front lines, toulomne city residents are under voluntary evacuation orders. nick and carl kautzer have already packed up their belongings and their carpentry tools. now all they can do is wait. >> maybe another day and a half. i'm just guessing. i don't know how fast it's moving. >> reporter: firefighters say the blaze has moved up to 5% containment, and, jim, they are using a tactic called indirect attack, which they are hoping creates control lines away from the fire's edge. >> axelrod: teresa garcia, thank you. also tonight, the desert southwest is under threat this, from tropical storm eva. for the latest we turn to meteorologist david bernard from our miami station wfor. david, we're talking about

flooding here. which states? >> jim, that is going to be the biggest threat. california, arizona, nevada, utah-- that is the prime target for the heavy rain over the next 48 hours. the storm right now is located a couple of hundred miles west of cabo san lucas, off the tip of the baja peninsula, but it's moving to the north-northwest. now the storm is going to weaken and will no longer be a tropical storm, but all of this moisture, the green, is streaming across mexico into the southwest and that is setting the stage for flooding. look at all the flood advisories in effect for tonight, including phoenix, las vegas, and all of the mountainous areas east of los angeles and san diego, already even some flood warnings are in effect and rainfall potential going into monday night, widespread 1-2 inches in the green but really significant are the patches of yellow in some of the mountainous areas indicating we could see two, three, maybe locally more rain than that. when you start talking about rain totals of two to three

inches in the desert southwest that has the potential for major flash floodings and mudslides and they will be on high alert for the next 48 hours. >> axelrod: thousands of people gathered in the nation's capital today to mark the 50th anniversary of the march on washington, and one of the most important speeches in american history. there was no official count of the size of the crowd, but it stretched from the lincoln memorial, down the length of the mall's reflecting pool and beyond. as jeff pegues reports, the day was filled with speech about race in america and one man's dream. >> reporter: today, the national mall looked a lot like it did 50 years ago as a new generation joins civil rights icons. >> we cannot go back. we've come too far. >> reporter: and the everyday heroes of a nation's painful struggle for justice and equality for all. clifford lee was here in 1963. >> i was inspired then. i'm still inspired by that speech. >> i have a dream that one day

this nation will rise up, live out the true meaning of its creed. >> reporter: king's "i have a dream" speech inspired a movement and tens of thousands of people have come from across the nation to honor his vision. congressman john lewis says that vision includes everyone. >> it doesn't matter whether we're black or white, latino, asian, american, or native american, it doesn't matter whether we are straight or gay. we are one people. >> reporter: many came on buses, leaving home in the early morning hours to retrace the steps of this historic march. >> we're here to pay homage to that moment in time, but also to carry that forward. >> reporter: edith lee payne walked as a 12-year-old. here she is that august day, barely tall enough to see through the crowds. >> i'm honored to be here standing for those that were here before and aren't here today. >> reporter: but this is not

just a commemoration. it's a call to action. martin luther king iii told the crowd he believes his father's dream has not yet been realized. >> far too frequently, the color of one's skin remains a license to profile, to arrest, and to even murder with no regard for the content of one's character. >> reporter: half a century later, while many here are celebrating progress, 81-year-old clifford lee says the march continues. >> we haven't come far enough. we've still got a long ways to go. >> reporter: today was the march. wednesday is the anniversary of dr. king's "i have a dream" speech. president barack obama will be here to deliver a speech of his own. looking out at the washington monument, just as dr. king did 50 years ago. jim. >> axelrod: jeff, thank you. and later in the broadcast, we will look back at the freedom singers and the power of music in the civil rights movement. president obama met with his

national security team for three hours at the white house today to consider the next steps in syria in the wake of the regime's suspected use of chemical weapons against civilians. defense secretary chuck hagel, who took part from asia, says no decision has been made but said the president is considering "all military options." the international aid group doctors without borders said today more than 3,000 people were hospitalized in syria wednesday with what it calls neurotoxic symptoms. 355 of them died. as holly williams reportes, both sides in the conflict are ausing each other of using chemical weapons. a caution-- some of the images in this piece are disturbing. >> reporter: well aware of the power of video in this conflict, syrian state tv broadcast images today of what the government claims are chemical agents discovered by their soldiers in tunnels used by rebel forces in damascus. the regime says this is evidence

it's the syrian option using chemical weapons, not them. we can't be sure what's inside these small plastic drums. the government's claims follow international demands that the syrian regime allow united nations weapons inspects to visit the scene of wednesday's attack. this morning, the u.n.'s high representative for disarmament angela kane arrived in damascus, upping the pressure. meanwhile, devastating new video emerged today from right after the alleged chemical strike. we can't independently verify them, but they show people gasping for breath, foaming at the nose and mouth, and suffering from convulsions. all symptoms typical of a chemical attack. in a crowded make shift morgue, a father is shown embracing his two young daughters. both of them dead. "wake up, my sweetheart," he cried.

"for god's sake, what did i do." this seems to show a family who never made to the hospital, discovered dead in their own home but with no obvious injuries. it's all consistent with the use of a nerve agent. but that can't be proven until the u.n. weapons inspectors are allowed in to test soil and tissue samples. until then, the outside world is left searching for answers about what really happened and weighing what to do in response. holly williams, cbs news, london. >> axelrod: turning now to the sexual harassment scandal in san diego's city hall, bob filner, the mayor of america's eighth largest city has finally agreed to resign from office after 18 women accused him of inappropriate behavior. but as carter evans tells us, he did not go quietly, defiant to the end. >> reporter: this is the headline many san diegans were waiting for. after six weeks of scandal, mayor bob filner's resignation

came with a public apology. >> the city should not have been put through this. and my own personal failures were responsible. >> reporter: 18 women have accused fillener of sexual misconduct and at first, he seemed contrite. >> all the women that i offended, i had no intention to be offensive. >> reporter: but he remained defensive. >> i have never sexually harassed everyone. >> he is basically in denial, didn't want to admit to anything, and said he didn't commit sexual harassment. then what are you apologying for the first time. >> reporter: retired san diego police officer rocky ventittelli volunteered in the effort to recall fillener. he gathered 1500 signatures in just five days. the mayor dismissed the movement as a media-driven frenzy. >> rumors become allegations. allegations become facts.

facts become evidence. of sexual harassment. >> i think that's typical of anybody who is unethical and commits any type of crime-- blame somebody else. "it's not me, it's you." >> reporter: ventittelli believes it was the crass-roots recall effort that ultimately succeeded. if fillener didn't leave on his own, he would be thrown out. >> i think he was scared of us, yup. there's no doubt. the power of the people spoke. >> reporter: and the message was clear. carter evans, cbs news, los angeles. >> axelrod: and later, it's a panda. the national zoo celebrate the birth of a new cub. linda ronstadt explains why she will sing no more. and an old school bus hits the road to deliver lunch to hungry kids. for sensitive skin, there's fusion progl our ms are thinner than a surgeon's scalpel for our gentlest shave.

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>> axelrod: one out of four american children depends on government programs for food. in certain part of the country, the need is much greater than others, especially at this time of year. don dahler now takes us to one. >> reporter: it's lunchtime in rural tennessee. >> come on, sweetie! >> reporter: and the kids have been waiting. >> come on, hon. >> reporter: some come with parents. others come alone. once on aboard, anyone under 18 eats for free. >> delicious! >> reporter: during the summer month, four of these lunch express buses wind through the northeastern part of the state bringing balanced meals to about 200 low-income kids, including nine-year-old gary yelton. >> they mostly give you fruit, vegetables. >> reporter: and second grader jasmein church. >> they help you be healthy. >> reporter: in this part of appalacha, about two out of five

children don't always know where the next meal is coming from. many depend on the free school lunch program, but with classes out, and limited transportation, summer can be the hungriest time of year. >> and so at that point we said we've got to do something and we've got to be able to take meals to them. >> reporter: rhonda chafin, executive director of second harvest food bank, says they had to go mobile. >> rural hunger is real. it's real in other rural areas of the united states. and food banks are struggling to get food to children and families in rural areas. >> reporter: since 2007, chaffin says the food bank has seen demand increase by 56%. >> ready? >> reporter: hazel lane brings neighborhood kids, including hers, to the bus every week day. >> with everything the way it is, a free lunch for them saves money for ever parent. >> reporter: christina silas: >> i like it because they're always hungry, always hungry. i mean, always. >> reporter: with most people

in the trailer park on food stamps and many of its residents unemployed, lane says the lunch express is a blessing for the children at her stop and every stop along its route. >> everyone needs to help these kids. these are our children, and no chyle have ever have to be hungry. >> reporter: don dahler, cbs news, new york. >> axelrod: and we have some sad news to share tonight about a pop music icon. ♪ ♪ you're no good, newer no good, baby, you're no good ♪ >> axelrod: linda ronstadt can no longer sing. she's telling aarp magazine that parkinson's disease has robbed her of her ability to produce "even a single note." the 11-time grammy winner was diagnosed with the disease eight months ago. linda ronstadt is 67 years old. it's not a real baby but it's getting a lot of attention. the latest on a newborn panda at

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with more voices from the civil rights movement, which is marking the 50th anniversary of one of the most famous speeches in american history on the mall in washington. but as jan crawford tells us, it wasn't always the spoken word that rallythe troops. >> reporter: they endured beatings, fire hoses and arrests. regular people who came together and changed a nation. and through it all, there was song. >> the songs we were singing actually echoed where we were. >> reporter: historian bernice johnson reagon was a leader of change, a protestener her home state of georgia, before joining the freedom singers which toured the country in 1963. they were up on stage for the march on washington. thes regon on the left.

regon says the music was also a battle cry. demonstrators were armed with song, peaceful, yet still forceful and defiant. even an old children's sunday school song became a protest. >> most people say it's a sad song. "i'm going to let is tshine" is really a charging, lightning song. >> reporter: regon says she didn't appreciate the song's power until she sang it in jail with other protesters after a mass arrest following a demonstration. behind bars, she said, singing was crucial. >> most of the time, we sang. sometimes there would be a prayer, but singing was the constant. >> reporter: the music had a familiar sound, spiritual, sung during slavery, but the words sometimes changed to fit the movement.

"we shall overcome" the theme song for the movement, originally was "i will overcome." singing, regon says, was as elemental as eating or breathing. >> because we're sing people. and that's in the culture. it is that essential to your strength and your sanity. ♪ we shall overcome >> reporter: jan crawford, cbs news, washington. >> axelrod: that is the cbs evening news for tonight. i'm jim axelrod in new york. for all of us here at cbs news, thanks for joining us. and good night. captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org ,, goodnight.

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